Mining machine



Nov.-5, 1935. w. w. SLQANE 2,020,003

MINING MACHINE Original Filed Feb. 6 1933 8 Sheets-Sheet l W. W. SLOANE .MINING MACHINE Nov. 5, 1935.

8 Shets-Sheet 2 Original Fiied Feb. 6, 1955 Zdllimz QQQAMV.

Nov. 5, 1935. w w. SLOANE 2,020,003

MINING MACHINE Original Filed Feb. 6, 1955 8 Sheets-Sheet 3 1 1/6/1501" ZUz'ZZz'am ZM J'Jmme 81W. a. v War/1% W. W. SLOAN E Nov.. 5, 1935.

MINING MACHINE Original Fiied. Feb. 6, 1933 s Sheets-Sheet 4 W. W. SLOANE Nov. 5, 1935.

MINING MACHINE Original Filed Feb. 6, 1933 8 Sheets-Sheet 5 me? P Nov. 5,- 1935.

W. W. SLOANE MINING MACHINE Original Filed Feb. 6, 1953 8 Shets-Sheet e NOV. 5, W. W. SLOANE 1 MINING MACHINE Original Filed Feb. 6, 1933 8 Sheets-Sheet 7 Shy/0 1550077 01 Zfii/Zz'am ZZ/ flown Nov. 5, 1935. w. w. SLOANE 2,020,003

MINING MACHINE Original Filed Feb. 6, 1935 8 Sheets-Sheet 8 k 111 a M! 16}; 45g

Patented Nov. 5, 1935 UNITED area NT or ies Goodman Manufacturing Company,

Chicago,

111., a corporation of Illinois Application February 6 1933, Serial No. 655,393

Renewed March 2, 1935 33 Claims.

This invention relates to improvements in mining machines and more particularly to mining machines of the type adapted to out both horizontal and shearing kerfs in a mine wall.

The principal objects of my invention are to provide a new and improved mining machine of the class described constructed with a view to- Wards utmost efiiciency, adaptability for varying cutting conditions, ease, and safety of operation,

and 50 arranged as to provide a compact, mobile machine capable of cutting horizontal kerfs adjacent the mine floor or at various elevations with respect thereto and vertical or shearing kerfs without withdrawing the horizontal cutting element from the coal.

A prior application, Serial No. 488,439, filed October 13, 1930, shows a mining machine of the general type disclosed in my present application. My present application, however, relates to certain novel improvements over the device shown in my prior application.

My invention may be more clearly understood with reference to the accompanying drawings wherein:

Figure 1 is a perspective view of one embodiment of my invention;

Figure 2 is a plan view of the device shown in Figure 1 with certain parts broken away and in section to more clearly show certain details of my invention;

Figure 3 is an enlarged partial fragmentary end view showing certain details of the rearward portion of the cutting mechanism with parts broken away and in section and with the truck frame shown in vertical section;

Figure 4 is an enlarged top plan View of a portion of the embodiment of my invention illustrated in Figure '1, with parts broken away and in section to show certain details of the cutting mechanisms;

Figure 5 is an enlarged detail side elevation of a portion of the embodiment of my invention illustrated in Figure l, with parts of the vertical shearing cutting mechanism shown in substantial longitudinal section;

Figure 6 is a sectional view taken substantially along line B5 of Figure 4;

Figure 7 is an enlarged detail View showing certain details of the means for selectively connecting the motor of one cutting mechanism to the other cutting mechanism;

Figure 8 is an enlarged detail forward end View of the shearing cutting mechanism with parts broken away and in section;

Figure 9 is an enlarged detail iew of the forward portion of the shearing cutting mechanism taken in side elevation showing certain details which are not shown in Figure 8;

Figure 10 is a sectional View taken substantially along line Ill-iii of Figure 5;

Figure 11 is a sectional view taken substantially along line i l-| I of Figure 5;

Figure 12 is a sectional view taken substantially along line l2-l2 of Figure 5; and

Figures 13, 14, and 15 are diagrammatic views 10 showing the details of the mechanism for automatically controlling movement of the shearing cutting mechanism.

Like reference characters refer to like parts throughout the various figures. 15 The embodiment of my invention illustrated in the drawings, includes a truck l0 mounted on track wheels ii and axles l2. Said truck is provided with a turntable I 3, which turntable in turn supports a cutting element l4 disposed to one 20 side of the center line of said turntable. Said cutting element is provided with a horizontal cutter bar I5 having a cutter chain l6 movable thereabout in a closed orbital path for cutting a horizontal kerf adjacent the mine bottom in 25 front of and to each side of the mine track or at various elevations with respect thereto. An extensible and retractable shearing cutting element I1 including a cutter bar l8 having a cutter chain 19 movable thereabout in a closed or- 30 bital path in a vertical plane is also carried on said turntable on the opposite side thereof from the cutting element !4.

The cutting element I4 is of a type similar to that disclosed in a prior application of William 35 T. McCullough, Serial No. 402,505, filed October 25, 1929, which issued as Patent No. 1,938,850 on December 12, 1933, so will not herein be shown or described in detail excepting to set forth certain parts necessary to clearly understand the inven- 40 tion and illustrate certain novel features not shown in said aforementioned prior application and includes a rearwardly disposed motor 20 having a cutter frame 2| extending forwardly thereof beyond said turntable and truck. 5

The cutter bar I5 is carried by the cutter frame 2i forwardly of the turntable i 3 for pivotal movement about a vertical axis to permit adjustment of said cutter bar for cutting to each side of and in front of the track along the mine bottom, and 50 for adjustment towards and away from said outter frame in a plurality of parallel spaced guides 23 permitting adjustment of said cutter bar for cutting in a plurality of parallel planes in a man- 1 61' fully disclosed in the aforementioned McCul- 65 lough application, so not herein described in detail. Likewise, suitable locking means (not shown in detail) are provided for locking said cutter bar in any desired angular positionof adjustment with respect to said cutter frame.

The cutter frame 2| and cutting element I4 is supported on the turntable l3 rearwardly of the parallel spaced guides 23 for pivotal movement about an axis disposed transversely of said cutter frame on suitable trunnion supports, generally indicated by reference character 29, and movement of said cutting element about its axis of pivotal connection to said trunnion supports is controlled by a suitable yieldable adjusting means in a usual manner and generally indicated by reference character 30.

The turntable i3 is herein preferably shown as being turned by a motor 3| mounted on the truck [0 rearwardly of said turntable and the cutting elements l4 and IT. A suitable system of reduction gears is provided for turning said turntable in a manner which has been fully described in my aforementioned prior application, and said turntable provides a means for adjusting the cutting position of the cutter bar l5 and feeding it across the face of the coal.

The apparatus is propelled about the mine and the cutter bar l5 may be fed into the coal or along the'coal face by the track wheels l I driven from the motor 3| through a suitable system of reduction gearing and suitable chain and sprocket drives in a manner which has fully been described in my aforementioned prior application, it being understood that flexible feeding means (not shown) may also be provided for sumping said cutter bar into or feeding said cutter bar along the coal face when desired.

Referring now in particular to the details of several of the novel features of my invention, the shearing cutting element I! comprises a housing and support frame 33 split in a vertical plane and divided into a forward and rearward section. Said housing and support frame forms a bearing support for the cutter bar I8 and carries said cutter bar for pivotal movement about a horizontal axis extending transversely thereof in a manner which will hereinafter be more fully described and forms a housing and bearing support means for the gearing forpivoting said cutter bar and feeding it into or withdrawing it from the coal face. Said housing and support frame is supported by a guide frame 34 for slidable movement therealong. Said guide frame is secured to the turntable I3 in a suitable manner and extends parallel with and longitudinally of the cutting element l4 beyond the forward and rearward extremities of said turntable.

The guide frame 34 includes an angle 36 resting on suitable pads 32, 32 and secured to the turntable l3 on one of its legs, said leg extending towards the cutting element I4 and longitudinally of said cutting element. Said angle extends forwardly beyond the turntable and truck a substantial distance and rearwardly beyond said turntable. An angle 31 is secured to the vertical leg of the angle 36 adjacent the outer side thereof and its opposite leg extends inwardly toward the cutting element I4 in thesame direction as the horizontal leg of the angle 36. The top face 'of the horizontal leg of the angle 31 is finished to form a slidable support for the housing and support frame 33. An upstanding support bracket 38 is secured to the forward portion of the angles 36 and 3'? in a suitable manner and has a portion extending inwardly and beneath a spacer plate 35 abutting the underside of the horizontal leg of the angle 36 and an upstanding portion extending along and secured to the outer sides of the vertical leg of the angle 31.

A T shaped guide member 39 is connected to a forked upper end of the support bracket 38 in a suitable manner. Said guide member extends rearwardly from the support bracket 38 and is secured to the forward side of a gear housing 40. Said gear housing extends upwardly from and is secured to a suitable bracket 43 extending rearwardly from the turntable I3 and to the rearward end of the angles 36 and 31 of the guide frame 34 in a suitable manner. The stem of the T shaped guide member 39 is adapted to engage a suitable guide groove 4| formed in the upper portion of the housing and support frame 33 for guiding the cutting element H for movement along the guide frame 34 and holding said support frame and the cutter bar IS in a substantially vertical position. Suitable bearing shoes 42 and 43 are disposed adjacent the forward and rearward ends of the housing and support frame 33 and are adapted to rest on and have sliding engagement with the top surface of the angle 31. A suitable retaining member 44 is secured to the housing and support frame 33 beneath the bearing shoe 42 and has slidable engagement with a finished undersurface of the horizontal leg of the angle 31. A retaining member 45 is secured to the inner side of the housing and support frame 33 adjacent the bearing shoe 43 and has a portion adapted to engage a finished undersurfacc of the horizontal leg of the angle 31'.

The cutter bar i8 is secured to a cutter bar support member 47, which cutter bar support member is provided with a circular groove disposed in a vertical plane and is adapted to be engaged with a suitable bearing member formed integral with the forward and rearward halves of the housing and support frame 33 so that said cutter bar support member may be pivotally moved about an axis extending transversely of the cutting element IT to permit vertical feeding movement of said cutter bar.

A transversely extending shaft 48 is journaled within the cutter bar support member 41 in a suitable manner for rotation about an axis coaxial with the axis of pivotal movement of said cutter bar support member and has a sprocket 49 keyed to its outer end adjacent the cutting element l4 and a bevel gear 55 keyed to its inner end. Said sprocket meshes with and drives the cutter chain 19 about the cutter bar It in a usual manner and said bevel gear is driven from the motor 20 in a manner which will hereinafter be more fully described.

Referring now in particular to the means for driving the bevel gear 50 from the motor 20 and to the means for pivotally moving the cutter bar l8 about a transverse axis and for extending and retracting said cutter bar with respect to the truck It, a splined shaft 5! is provided. Said splined shaft is journaled adjacent its forward end in a suitable ballbearing 53 supported in the support bracket 38 in a usual manner. The rearward end of said splined shaft is carried in an internally splined hub of a spider 54 which carries a spur gear 55. The outer periphery of the hub of the spider 54 is journaied in a suitable bearing support, generally indicated by reference character 56, and carried by the gear housing 40 in the forward side thereof. The spur gear 55 is meshed with and driven by a reach gear 51 carried by the forward half of the gear housing 40 on a suitable shaft secured thereto. Said reach gear in turn is meshed with and driven by a spur pinion 58 on the forward end of a longitudinally extending shaft 59 journaled in a suitable bearing support member 6&3 in a usual manner, which bearing support member is carried in the forward portion of the gear housing 40 and extends forwardly therefrom.

The forward end of the longitudinally extending shaft 59 is connected to a forwardly extending shaft 6| by means of a suitable universal connection in a usual manner and generally indicated by reference character 83. The forward end of the shaft 6! is splined and engages a splined sleeve fi l, which sleeve in turn forms a portion of a universal connection generally indicated by reference character 65.

The universal connection 65 is adapted to have selective connection with the rearward end of a shaft 66 for the motor 28 through suitable clutch means which include a clutch member 6? having forwardly facing clutch jaws 68 formed integral therewith freely mounted on the motor shaft 66. Said clutch jaws are adapted to engage suitable clutch jaws 69 formed in the forward face of a member l0 keyed on the motor shaft 56 for driving the shaft 59 and spur pinion 58 from the motor 20 through the clutch member El and universal connections 63 and 65 in an obvious manner. A suitable nut H is provided on the rearward end of said motor shaft and is adapted to engage a suitable recessed portion in the clutch member 61 to limit rearward movement of said clutch member along said shaft.

The clutch member 67 is shifted along the shaft 66 by means of a suitable clutch collar 12 engageable with a groove formed around said clutch member and a clutch fork l3 engaging said collar in a usual manner. Said clutch fork is pivotally mounted on a rearwardly extending portion of the cutting element I 4 on a pivotal pin 14. Said clutch fork is operated by a suitable hand lever 15 secured to the upper end of the pin 14.

The clutch member 61 is interlocked with the means for driving the cutter chain It about the horizontal cutter bar H) in such a manner that the cutting elements 14 and H may not both be driven at the same time. This interlocking means is herein preferably shown as comprising a locking lever 76 secured to the pivotal pin 74 beneath the hand lever 75 and extending therefrom in a forwardly direction (see Figs. 2 and 4) and adapted to be engaged by or engage another locking lever 11 secured to a pivotal pin it pivotally supported in the frame for the cutting element I l and spaced inwardly from the locking lever 16. When the locking lever 'l'! is held from movement and engages the locking lever 16, the hand lever 15 is locked in a fixed position in an obvious manner.

A lever arm 19 is secured to the pivotal pin 18 and extends inwardly therefrom and its outer end is connected to a connecting rod 80. The opposite end of said connecting rod has pivotal connection with a lever arm Bl secured to a pivotal pin 82. The pivotal pin 82 is journaled in the cutter frame 2! and has a clutch fork 83 secured thereto for operating said clutch fork and slidably moving a clutch member as along a sleeve journaled in the cutter frame 2| and mounted on a longitudinally extending shaft 86 for free rotation with respect thereto. The sleeve 85 is driven from the forward end of the motor shaft 6% through a suitable gear reduction, generally indicated by reference character 81. The clutch member 84 is feathered on the sleeve 85 and the shaft 86 is driven from said sleeve through a aged with teeth formed internally of the clutch member 84. The shaft 86 serves as a drive shaft for driving the cutter chain It about the cutter bar I5 and also as a means for adjusting the elevation of said cutter bar with respect to the mine bottom in a manner fully described in the aforementioned McCullough application. The pivotal pin 82 has a hand lever 89 secured to the upper end thereof for shifting the clutch member 84 along the sleeve 85 and shaft 86 for selectively connecting said shaft to the motor 20.

When the clutch jaws 68 are engaged with the clutch jaws 89, as shown in Figure 4, the locking lever it engages the locking lever TI and holds said lever from pivotal movement in one direction, Which in turn locks the hand lever 89 against movement and prevents engagement of the clutch member 84 with the pinion 88, and when the clutch jaws 68 are disengaged from the clutch jaws 69, the hand lever 89 is free to be moved for engaging the clutch member 84 with the pinion 88. Also, when the clutch member 85 is engaged with the pinion 83, the locking lever ll engages the locking lever l6 and locks the hand lever 75 against movement.

The bevel gear 55 is driven from the splined shaft 5| through a bevel pinion 90 keyed on a sleeve member 9i, which sleeve member in turn is journaled on a sleeve member 93 secured within an end plate 95 secured to the rearward end of the housing and support frame 33 by means of suitable nuts and bolts. The sleeve member 93 has a flange 95 abutting the inner side of the end plate 94 and the rearward end of the sleeve member 9|, and its outer end has a collar 96 threaded thereon abutting the opposite side of the end plate 94 for holding said sleeve member in a stationary position. Likewise, the sleeve member 9! has an inwardly extending flange formed integral therewith which abuts the inner end of the sleeve member 93. Suitable clutch jaws 99 are formed integral with the forward end of the sleeve member 9| and are adapted to en gage corresponding clutch jaws formed in a member lfifl. The member lti! is likewise provided with clutch jaws ml which are adapted to be engaged by corresponding clutch jaws formed integral with a sleeve member E82 splined on the splined shaft 5|. The forward end of the sleeve member I 021s adapted to abut a suitable bracket encircling the splined shaft 5! and formed integral with the housing and support frame 33. The member [GE] is so arranged with respect to the sleeve IE2 as to permit axial movement of said sleeve with respect to said member and the sleeve member ill to compensate for flexing of the splined shaft 5| and permit the sleeve member 9i to be driven from said shaft without binding or heating of the driving parts.

Referring now in particular to the means for pivoting the cutter bar it; and reciprocably moving said cutter bar along he guide frame 34, a spur gear )3 is out integral with the sleeve member 91 and meshes with and drives a spur gear ltd disposed above said spur gear, a spur pinion ms disposed to one side of said spur gear, and a spur gear Ifl'l disposed beneath said spur gear.

The spur gear l 64 is freely mounted on its hub in a suitable bearing member carried on a longitudinally extending shaft E23. Clutch sleeves I69, IE9 abut each other and are keyed to the pinion 88 keyed to said shaft adapted to be enlongitudinally'extending shaft I08. One of the clutch sleeves I09 forms one element of a friction disk clutch, generally indicated by reference character I I0. Said friction disk clutch has connection with the spur gear I01 for selectively connecting said spur gear with the longitudinally extending shaft I08 in a usual manner.

The spur pinion I05 is secured to one end of a longitudinally extending shaft I I I in a suitable manner. Said shaft in turn is journaled intermediate its ends in suitable bearing support means secured to the housing and support frame 33 in a suitable manner. A spur gear I I2 is secured to the opposite end of said longitudinally extending shaft and meshes with and drives spur gears H3 and H4 coaxial with the spur gears I04 and I01, respectively. The spur gear I I3 is freely mounted on a suitable bearing member carried by the longitudinally extending shaft I08. The opposite clutch sleeve I09 from the spur gear I04 forms an element of a friction disk clutch, generally indicated by reference character II5, so that said clutch sleeve and the longitudinally extending shaft l08 may be driven from the spur gear II3 through said friction disk clutch in an opposite direction to which they are driven from the friction disk clutch I I0. Thus, the longitudinally extending shaft I08 may be driven in opposite directions without reversal of the motor 20.

A sun gear H6 is keyed to the longitudinally extending shaft I08 forwardly of the hub of the spur gear I I3 and meshes with and drives planet ary pinions H1, H1 carried in a cage II8. Said planetary pinions mesh with an internal gear II9 keyed within a suitable support member formed integral with the housing and support frame 33 so that rotation of said longitudinally extending shaft will cause rotation of the cage I I8 at a reduced speed. Said cage is journaled on its hub within a suitable bearing support member formed integral with the housing and support frame 33 and has driving connection with the rearward end of a. longitudinally extending worm shaft I coaxial with the longitudinally extending shaft I08 and journaled at its rearward end on the forward end of said longitudinally extending shaft. The forward end of the longitudinally extending worm shaft I20 is journaled in a suitable bearing support formed integral with the housing and support frame 33.

A worm I2I is cut integral with the worm shaft I I20 and meshes with and drives a worm gear I23 keyed on a transversely extending shaft I24, which shaft in turn is journaled in suitable bearing supports formed integral with the housing and support frame 33. The worm I2I and worm gear I23 are of the self-locking type; that is, the pitch of said Worm and worm gear is such that said worm gear cannot drive said worm and will always be locked in a fixed position when not be ing driven by said worm. A pinion I25, herein preferably shown as being out integral with the inner end of the transversely extending shaft I24, is provided which meshes with an arcuate rack I26. Said arcuate rack is secured to the cutter bar support member 41 and extends in a generally vertical plane so that rotation of the pinion I25 will pivotally move the cutter bar I0 to about the axis of pivotal movement of said cutter bar support member and the shaft 48.

Thus, the cutter bar I8 may be pivoted about an axis extending transversely of the shearing cutting element I! at a relatively low frictionally controlled speed in reverse directions without reversal of the motor 20 for vertically adjusting or feeding said cutter bar, and said cutter bar may be locked in its various positions of angular adjustment with respect to the truck by means of the self-locking worm I2I and worm gear I23. 5

The spur gear I0! is freely mounted on a suitable bearing member carried on a longitudinally extending shaft I21 journaled at its rearward end in a suitable bearing support formed integral with the housing and support frame 33 and having a 10 splined forward end engaging a splined bore of a. worm shaft I29 journaled at its ends in a suitable bearing support means formed integral with the housing and support frame 33. Clutch I sleeves I 30, I 30 are keyed to the longitudinally 16 extending shaft I21. One of the clutch sleeves I30 has clutch means associated therewith forming a part of a friction disk clutch, generally indicated by reference character I3I, for selectively driving the longitudinally extending shaft I08 :0 from the spur gear III! in one direction.

The spur gear H4 is freely mounted on a suitable bearing member carried on the longitudinally extending shaft I21. A friction disk clutch, generally indicated by reference character I34, is as- 25 in an opposite direction than from the spur gear 30 A worm I is formed integral with the worm shaft I29 and meshes with and drives a worm gear I36 keyed on a transversely extending shaft I31 adjacent the inner end thereof. The pitch 85- of the worm I35 and worm gear I36 is such that said worm gear will be locked in a fixed position when not being driven by said worm. A pinion I39 is keyed on the transversely extending shaft I3'I adjacent the outer end thereof and meshes 40 with and drives a spur gear I40 keyed on a transversely extending shaft I4I adjacent the outer end thereof. A rack pinion I43 is keyed on the opposite end of the transversely extending shaft HI and meshes with a rack I44 secured to the 45 outer side of the angle 31 in a suitable manner and. extending longitudinally of the guide frame 34.

It is thus apparent that when they friction disk clutch I3I is in an engaged position, that the be moved along the guide frame 34 in a reverse direction at a relatively low frictionally controlled speed without reversal of the direction of rotation of the motor 20, and that said cutting element may be locked in various fixed positions along said guide frame by means of the selflooking worm I35 and worm gear I36.

With reference now to the novel means for shifting the friction disk clutches H0, H5, I3I, and I34, and automatically stopping pivotal or longitudinal movement of the cutter bar I8 which is best shown in Figures 10 to 15, inclusive,

a common clutch collar I45 is arranged coaxial with the clutch sleeves I09, I09 for actuating the clutches H0 and H5 so that the clutch IIO will be in an engaged position when the clutch II 5 3 is disengaged and vice versa. A clutch yoke I45 has engagement with the clutch collar I45. A clutch fork I 41 is pivotally mounted on a rock shaft I48 extending transversely of the cutting element I1 and has operative engagement with the clutch yoke I 46. A hand lever I49 is keyed to the outer end of the rock shaft I138. so that movement of said hand lever will rock said shaft the free end of the lever arm I59 and depends therefrom. The opposite end of said connect-v ing link is slotted and said slotted portion is adapted to receive a pin I53 extending inwardly from a lever arm I54 secured toa rock shaft 155 pivotally supported in the housing. and support frame 33 (see Figs. 13, 14, and Another .lever arm I56 extends forwardly and upwardly of the rock shaft I55. Said lever arm has an upper face of an arcuate shape and is adapted to be engaged by one arm I 51 of an operating member I58 pivotally carried by the housing and support frame 33 for movement about a horizontal axis disposed intermediate its ends. An arm I59 extends forwardly of the arm I51 and is adapted to be engaged by a stop I 66 on the cutter bar support member 61. V a

As is herein preferably shown, the friction disk clutch II 5 is in an engaged position when it is desired that the cutter bar is be moved in an upwardly direction. Thus, when said cute ter bar is moving in an upwardly direction and reaches the limits of its upward travel, the stop I69 will engage the arm I59 of the operatingmember I58. Further movement of said cutter bar in the same direction will pivotally move theoperating member I58 and cause the arm i51 to pivot the lever arms I56 and I 54 about the,

axis of the rock shaft I55, which in turn will move the connecting link I5I in an upwardly direction and pivotally move the lever arm I56 and rock shaft H19 in a counterclockwise direction for disengaging the friction disk clutch I 55 and shifting the clutch collar I65 to a neutral position (see Fig. 14). 7

Referring now to Figure 15 and the means for automatically stopping downward movement of the cutter bar 19 a lever arm I6I is secured to the rock shaft I 55 and depends therefrom. Said lever arm has a beveled lower face which is adapted to be engaged by an upwardly extending arm I62 of an operating member I63. Said operating member is carried on a pivotal pin I64, which pivotal pin is carried adjacent the forward portion of a member I65 disposed beneath the lever arm I61 and pivotally connected to the housing and support frame 93. Downward movement of the member 165 is limited by means of a stop I81. The operating member I63 is provided with a forwardly extending arm I66 which is adapted to be engaged by the stop I69 for pivotally moving said arm in a clockwise direction and in turn moving the lever arm I54 in a counterclockwise direction for disengaging the friction disk clutch I if! and shifting the clutch collar I45 to a neutral position, as shown in Figure 13. i

It is thus apparent that automatic means have been provided for automatically shifting the friction disk clutches II 9 or I I5 to a neutral position when the cutter bar I8 is in an extreme lowered or elevated position, said cutter bar being held in said positions by means of the worm I 2! and wo m g r z i h r 'qf h e -lo king pe,

and that this automatic. shifting means is of a simplified construction and operates in a positive and efficient manner.

Theclutches I3I and I34 are shifted by means of a suitable clutch fork I61 in a usual. manner. The clutch fork I61 is carried on a vertically extending shaft I68. A lever arm I 69 is formed integral with the clutch fork I61 and extends rearwardly therefrom in a direction towards the outer side of the cutting element I1. A lever arm I16 ispivotally connected to the outer end of the lever arm I69 and is keyed to a vertically extending rock shaft I1 I The vertically extending rock shaft I H is journaled in the rearward portion of the housing and support frame 33 and a hand lever I19 is keyed to its upper end so that pivotal movement of said hand lever will cause pivotal movement of the clutch fork I61 about the axis of the rock shaft I68 for shifting one or the other clutches I3I or I34. A lever arm I14 is keyed to the lower end of the rock shaft IN and extends inwardly therefrom. The lever arm I14 is adapt-' ed to be engaged by a suitable stop I15 extending forwardly of the gear housing 49 for moving said lever arm about the axis of pivotal movement of the rock shaft HI and shifting the friction disk clutch I34 to a neutral position and stopping rearward movement of the cutting element I1 along the guide frame 34.

A rod I16 is carried in the housing and support frame 33 adjacent the lower portion thereof for longitudinal slidable movement with respect thereto and its rearward end is in alignment with the free end of the lever arm I'M. The forward end of the rod I16 is adapted to engage the support bracket 38 when the cutting element I1 is moving forwardly along the guide frame 39 for pivotally moving the lever arm i 14 and shifting the friction disk clutch I3I to a neutral position when the cutting element I 1 is in an extreme forward position with respect to the guide frame 34.

Suitable interlocking means are provided for interlocking the clutches H6 and I34 and stopping rearward movement of the cutting element I1 along the guide frame 34 when the cutter bar I6 is in a downward position to prevent the cut ter chain I9 from cutting into the truck I6 and turntable I3 and limiting downward movement of said cutter bar when the cutting element I1 is in a retracted position on said guide frame, which means, as herein shown, comprise a lever arm I11 formed integral with the clutch fork I61 and extending outwardly and forwardly therefrom. A connecting link I 18 has a slotted rearward end which has pivotal connection with a forked outer end of the lever arm I11. Said connecting link in turn has a slotted fcrwardend which has slidable engagement with a pivotal pin I19 secured to the lower end of a lever arm I86, which lever arm is in turn secured to the rock shaft I 55.

A rider arm I83 extends downwardly from the member I65 and has a roller I84 carried adjacent its lower end, which roller is adapted to ride along a cam member I85. Said cam member extends longitudinally of the angle 36 for a portion of its length and is secured to the upper face of the horizontal leg of the angle 36. The forward end of the cam member I85 is beveled to elevate the roller I94 and pivotally move the member I65 about its axis of pivotal connection to the housing and support frame 33 for elevating said memher and the operating member I63 upon rearward movement of the shearing cutting element I1 along the guide frame 34. When the cutter bar I9 ispositioned so that the cutter chain is liable to cut into the truck and turntable upon rearward movement of the cutting element II, the stop I60 will engage the arm I66 of the operating member I63 and hold the arm I62 in a relatively vertical position in engagement with the lever arm I6I. As said cutting element moves rearwardly along the guide frame 34 and the roller I84 engages the beveled forward end of the cam member I85, the member I65 will be elevated which will pivot the operating member I63 about the center of pivotal movement of the pivotal pin I64 and move the arm I62 in a forwardly direction. This will in turn pivotally move the lever arm IGI about the axis of the rock shaft I55 and pivotally move the lever arm I88 in a counterclockwise direction. Movement of the lever arm I in a counterclockwise direction will cause movement of the connecting link II8 which-in turn will pivot the lever arm I" and throw the friction disk clutch I 3| to a neutral position.

When the friction clutches I I8 and I3I are both in an engaged position and the roller I 84 engages the beveled forward end of the cam members I85, the lever arm I6I will actuate the lever arm I54 and throw the clutch IIO to a neutral position, as well as the clutch I3I, in a manner which has hereinbefore been fully described. It should be understood that the slots in opposite ends of the connecting link I18 are so arranged as to prevent actuation of the lever arm II'I by means of the cam member I85 and roller I84 except when the cutter bar I8 is in a lowered position and to prevent actuation of the clutches I ID or I I5 when either of the clutches I3I or I34 are operated.

It should be noted that the cam member I35 is gradually inclined upwardly towards the rearward end thereof to form a means for raising the pivotal axis of the operating member I66 as the cutting element I'I moves rearwardly along the guide frame 34 and thus change the position of engagement of the stop I60 with said operating member to permit said stop to engage said operating member in such a manner as to automatically stop downward pivotal movement of the cutter bar I8 and prevent the cutter chain I9 from cutting into the turntable I3 when said cutter bar is in various retracted positions with respect to the guide frame 34, and thus permit said cutter bar to swing in a greater are when in an extended position with respect to said guide frame than when in a retracted position with respect to said guide frame.

It may thus be seen that a new and improved mining machine of a novel construction has been provided which may cut shearing kerfs in the mine wall when the horizontal cutter bar is sumped into the coal, which machine is so arranged that vertical pivotal movement of the shearing cutter bar is automatically controllable so as to be stopped in the desired position to minimize the possibility of breakage of the parts of the machine and digging into the mine wall or mine roof by the cutter bar, that reciprocable movement of said cutter bar along its guide frame is also automatically controllable so the cutting element may automatically be stopped when at either extreme end of its path of travel along the guide frame 34 and that the mechanisms for automatically shifting the clutches for controlling vertical and horizontal movement of the cutter bar are interconnected so as to prevent rearward horizontal movement of the cutting element beyond a certain predetermined point when the cutter bar I8 is in a lowered position.

It may also be seen that the shearing cutting element is driven from the motor for operating a horizontal cutting element in a novel manner by a simplified system of gearing and that a novel mechanical interlocking means is provided to prevent operation of the shearing cutting ele- 5 ment when the horizontal cutting element is in operation and vice versa.

Although I have herein shown and described one embodiment of my invention, it will be understood that the construction and arrangement of 10 the various parts may be altered or changed. without departing from the spirit or scope of my invention. Furthermore, I do not wish to be construed as limiting myself to the specific form illustrated herein, excepting as it may be par- 15 ticularly limited in the appended claims.

I claim as my invention:

1. In a mining machine, a frame, a kerf cutter thereon, means for pivotally moving said kerf cutter about an axis disposed adjacent one of its 20 ends, means for extending or retracting said kerf cutter with respect to said frame, automatic means for stopping pivotal movement of said kerf cutter when in one extreme position or another and other automatic means interconnected 25 with said first-mentioned automatic means for stopping retraction of said kerf cutter when said kerf cutter is in a lowered position with respect to said frame.

2. In a mining machine, a frame, a kerf cutter 80 thereon, means for pivotally moving said kerf cutter about an axis disposed adjacent one of its ends, power driven means for swinging said kerf cutter in a vertical plane, power driven means for extending and retracting said kerf cutter with 85 respect to said frame, and automatic means interconnected between said means for pivoting said kerf cutter in a vertical plane and said means for extending or retracting said kerf cutter, for stopping retraction of said kerf cutter when said 40 kerf cutter is in a lowered position with respect to said frame.

3. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means 5 for swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme position or another, and other automatic means for stopping retraction of said kerf cutter when 50 said kerf cutter is in a lowered position with respect to said frame.

4. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for 55 swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme position or another, and other automatic means interconnected with said means for stopping extension or retraction of said kerf cutter for stopping retraction of said kerf cutter when said kerf cutter is in a lowered position with respect to said frame.

5. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme 70 position or another, automatic means for stopping pivotal movement of said kerf cutter when in one extreme position or another, and other automatic means, connectible with said means for automatically stopping extension or retraction of said kerf cutter when in one extreme position or another, for stopping retraction of said kerf cutter when said kerf cutter is in a lowered position with respect to said frame.

6. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme position or another, automatic means for stopping swinging movement of said kerf cutter when in one extreme position or another, and other automatic means, interconnected between said means for stopping extension and retraction of said cutter bar when in one extreme position or another and said means for stopping swinging movement of said cutter bar when in one extreme position or another, for stopping swinging movement of said cutter bar in a downwardly directionwhen said cutter bar is in a retracted position with respect to said frame.

7. In a mining machine, a frame, a kerf cutter thereon, means for pivotally moving said kerf cutter about an axis disposed adjacent one of its ends, means for extending or retracting said kerf cutter with respect to said frame, automatic means for stopping swinging movement of said kerf cutter when at one extreme position or another and for stopping extension or retraction of said kerf cutter along said frame when in one extreme position or another, and means interconnected with said means for automatically stopping extension or retraction of said kerf cutter along said frame for automatically stopping downward swinging movement of said kerf cutter at a predetermined point when in a retracted position with respect to said frame.

8. In a mining machine, a frame, a kerf cutter thereon comprising a cutter bar having a cutter chain movable thereabout, a motor, a geared connection from said motor to said cutter bar for driving said cutter chain about said cutter bar and for pivotally moving said cutter bar about an axis disposed adjacent its rearward end in reverse directions without reversal of said motor, another geared connection from said motor to said cutter bar for moving said cutter bar along said frame in reverse directions without reversal of said motor, and means for automatically stop ping pivotal movement of said cutter bar when in one extreme position or another comprising clutch mechanism in said geared connection from said motor to said cutter bar, and mechanism connectible with said clutch mechanism and cutter bar for automatically shifting said clutch mechanism.

9. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated mechanism for shifting said clutches for connecting one or the other of said clutches to said shaft, and automatic means for shifting said clutches to a neutral position when said cutter bar is in one extreme position or another comprising a stop movable with said cutter bar and engageable with the mechanism for shifting said clutches.

10. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme position or another, other automatic means for stopping swinging movement of said kerf cutter when in one extreme position or another and limiting downward swinging movement thereof when in a retracted position with respect to said frame and permitting the arc of swinging movement of said kerf cutter to increase as it is extended along said frame.

11. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for swinging said kerf cutter in a vertical plane, automatic means for stopping extensionor retraction of said kerf cutter when in one extreme position or another, other automatic means for stopping swinging movement of said kerf cutter when in one extreme position or another and limiting downward movement thereof when in a retracted position with respect to said frame and permitting the arc of swinging movement of said kerf cutter to increase as it is extended along said frame including a cam member extending longitudinally along said frame, said cam member being inclined upwardly towards the rearward end of said frame.

12. In a mining machine, a frame, a kerf cutter thereon, means for extending or retracting said kerf cutter with respect to said frame, means for swinging said kerf cutter in a vertical plane, automatic means for stopping extension or retraction of said kerf cutter when in one extreme position or another, other automatic means for stopping swinging movement of said kerf cutter when in one extreme position or another and limiting downward movement thereof when in a retracted position with respect to said frame and permitting the arc of swinging movement of said kerf cutter to increase as it is extended along said frame including a cam member inclined upwardly towards the rearward end of said frame and extending longitudinally therealong, and v stopping mechanism movable along said cam.

' 13. In a mining machine, a frame, a kerf cutter thereon, means for pivotally moving said kerf cutter about an axis disposed adjacent one of its ends, means for extending or retracting said kerf cutter with respect to said frame, automatic means for stopping swinging movement of said kerf cutter when at one extreme position or another and other automatic means for stopping extension or retraction of said kerf cutter along said frame when in one extreme position or another, and means interconnected with said means for automatically stopping extension or retraction of said kerf cutter along said frame for automatically stopping downward swinging m inent of said kerf cutter at a predetermined point when in a retracted position with respect to said frame and changing the position of this point as said kerf cutter is moved forwardly along said frame to permit the arc of movement of said kerf cutter to be increased as said kerf cutter is extended along said frame.

14. In a mining machine, a frame, a kerf cutter thereon, means for pivotally moving said kerf cutter about an axis disposed adjacent one of its ends, means for extending or retracting said kerf cutter with respect to said frame, automatic means for stopping swinging movement of said kerf cutter when at one extreme position or another and other automatic means for stopping extension or retraction of said kerf cutter along said frame when in one extreme position or another, means interconnected with said means for automatically stopping extension or retraction of said kerf cutter along said frame for limiting downward swinging movement of said kerf cutter when in a retracted position with respect to said frame including a cam member on said frame, a rider member adapted to engage said cam member, and an operative connection between said rider member and the means for controlling pivotal movement of said kerf cutter and the means for controlling extension or retraction of said kerf cutter with respect to said frame.

15. In a mining machine, a frame, a kerf cutter thereon, means for pivotally moving said cutter about an axis disposed adjacent one of its ends, means for extending or retracting said kerf cutter with respect to said frame, automatic means for stopping pivotal movement of said kerf cutter when at one extreme position or another and other automatic means for stopping extension or retraction of said kerf cutter along said frame when in one extreme position or another, and means interconnected with said means for automatically stopping extension or retraction of said kerf cutter along said frame for limiting downward pivotal movement of said kerf cutter when in a retracted position with respect to said frame and permitting the arc of pivotal movement of said kerf cutter to increase as said kerf cutter is extended along said frame including a cam member extending longitudinally along said frame and being inclined upwardly towards the rearward end thereof, a rider member adapted to engage and ride along said cam member, and operative connections between said rider member and the means for controlling pivotal movement of said kerf cutter and the means for controlling extension or retraction of said kerf cutter with respect to said frame.

16. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said clutches to said shaft, and automatic means for shifting said clutches to a neutral position when said cutter bar is in one extreme position or another comprising a stop movable with said cutter bar, a member disposed above the pivotal axis of said cutter bar having operative connection with said mechanism for shifting said clutches and adapted to be engaged by said stop and another member disposed beneath the pivotal axis of said cutter bar adapted to be engaged by said stop and having operative connection with said mechanism for shifting said clutches.

17. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between-said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said clutches to said shaft, and automatic means for shifting said clutches to a neutral position when said cutter bar is in one extreme position or another comprising a stop connectible with said cutter bar, a member disposed above the pivotal axis of said cutter bar adapted to be engaged by said stop, another member disposed beneath the pivotal axis of said cutter bar adapted to be engaged by said stop, a member interposed between said members and adapted to be engaged by each of said members and an operative connection from said last-mentioned member to said clutches.

18. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame in reverse directions, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said clutches to said shaft, another shaft parallel to said first-mentioned shaft and on the opposite side thereof from said second-mentioned shaft, a plurality of clutches on said third-mentioned shaft, geared connections between said first and third-mentioned shafts for driving said third-mentioned shaft from said first-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a lever arm having connection with said clutches for moving said kerf cutter along said frame, and means carried by said kerf cutter having operative connection with said lever arm and adapted to be engaged by said cutter bar for actuating said lever arm when said cutter bar is in a downward position.

19. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame in reverse directions, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a 7

2,020,003 geared connection from said last-mentioned shaft third-mentioned shaft from said first-mentioned I shaft in one direction When one of said clutches is connected thereto and-in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in'a lowered position comprising a lever arm having connection with said clutches for moving said kerf cutter along said frame, another lever arm movable with said first-mentioned lever arm having connection with said clutches for controlling pivotal movement of said cutter bar, and means carried by said kerf cutter having operative connection with said lever arms and adapted to be engaged by said cutter bar for actuating said lever arms when said cutter bar is in a downward. position.

20. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame in reverse directions, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said clutches to said shaft, another shaft parallel to said firstmentioned shaft and on the opposite side thereof from said second-mentioned shaft, a plurality of clutches on said third-mentioned shaft, geared connections between said first and third-mentioned shafts for driving said third-mentioned shaft from said first-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a lever arm having operative con nection with said clutches for moving said kerf cutter along said frame, a stop connected with said cutter bar, and means carried by said kerf cutter having operative connection with said lever arm and adapted to be engaged by said stop when said cutter bar is in a lowered position for actuating said lever arm when said kerf cutter is moved rearwardly along said frame.

21. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame 5 in reverse directions, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned 1o shaft in one direction when one of said clutches is connected thereto and in an oppositedirection when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means 15 for shifting said clutches for connecting one or the other of said clutches to said shaft, another shaft parallel to said first-mentioned shaft and on the opposite side thereof from said secondmentioned shaft, a plurality of clutches on said 2Ov third-mentioned shaft, geared connections between said first and third-mentioned shafts for driving said third-mentioned shaft from said first-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a lever arm having connection with said clutches for moving said kerf cutter along said frame, another lever arm movable with said first-mentioned lever am having connection with said clutches for controlling pivotal movement of said cutter bar, a stop connected with said cutter bar, and means carried by said kerf cutter having operative connection with said lever arms and adapted to be engaged by said stop when said cutter bar is in a lowered position for actuating said lever arms and shifting said clutches to a neutral position when said kerf cutter is moved rearwardly.

22. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame in reverse directions, means for swinging said cutter bar in a vertical plane comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said 5 clutches to said shaft, another shaft parallel to said first-mentioned shaft and on the opposite side thereof from said second-mentioned shaft, a plurality of clutches on said third-mentioned shaft, geared connections between said first and 7 third-mentioned shafts for driving said thirdmentioned shaft from said first-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto,

a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a lever arm having connection with said clutches for moving said kerf cutter along said frame, a stop connected with said outter bar, and means carried by said kerf cutter having operative connection with said lever arm and adapted to be engaged by said stop for actuating said lever arm when said kerf cutter is moved rearwardly along said frame and said cut- 7 ter bar is in a lowered position comprising a cam on said frame, a member pivoted on said kerf cutter and having a roller thereon adapted to engage same cam and a member adapted to be engaged by said stop having pivotal connection with said member and having operative connection with said lever arm for operating said clutches.

23. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal axis and movable along said frame in reverse directions, means for pivotally moving said cutter bar comprising a motor, a shaft driven thereby, a parallel shaft, a plurality of clutches on said parallel shaft, geared connections between said shafts for driving said second-mentioned shaft in one direction when one of said clutches is connected thereto and in an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said cutter bar, manually operated means for shifting said clutches for connecting one or the other of said clutches to said shaft, another shaft parallel to said first-mentioned shaft and on the opposite side thereof from said second-mentioned shaft, a plurality of clutches on said third-mentioned shaft, geared connections between said first and third-mentioned shafts for driving said third-mentioned shaft from said first-mentioned shaft in one direction when one of said clutches is connected thereto andin an opposite direction when said opposite clutch is connected thereto, a geared connection from said last-mentioned shaft to said frame for moving said kerf cutter along said frame, manually operated means for shifting said clutches, automatic means for shifting said clutches when said kerf cutter is at one end or the other of its path of travel, and means interconnected with said clutches for controlling pivotal movement of said cutter bar for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a lever arm having connection with said clutches for moving said kerf cutter along said frame, another lever arm movable with said first-mentioned lever arm having connection with said clutches for controlling pivotal movement of said cutter bar, a stop connected with said cutter bar, and means carried by said kerf cutter having operative connection with said lever arms and adapted to be engaged by said stop when said cutter bar is in a lowered position for actuating said lever arms and shifting said clutches to a neutral position when said kerf cutter is moved rearwardly comprising a cam on said frame, a member pivoted on said kerf cutter and having a roller thereon adapted to engage by said stop,

said cam and a member adapted to be engaged by said stop having pivotal connection with said member and having operative connection with said lever arm for operating said clutches.

24. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal transverse axis, a motor, a drive connection from said motor to said cutter bar for moving said cutter bar about said horizontal axis in reverse directions without reversal of said motor including a plurality of clutches, manually operated means for shifting said clutches, and automatic means for shifting said clutches to a neutral position when said cutter bar is in one extreme position or another comprising a stop movable with said cutter bar and engageable with the mechanism forshifting said clutches.

25. In a mining machine, a frame, a kerf cutter thereon including a cutter bar movable about a horizontal transverse axis, a motor, a drive connection from said motor to said cutter bar for moving said cutter bar about said horizontal transverse axis in reverse directions without reversal of said motor including a plurality of clutches, manually operated means for shifting said clutches, and automatic means for shifting said clutches to a neutral position when said cutter bar is in one extreme position or another comprising a stop connectible with said cutter bar, a member disposed above the pivotal axis of said cutter bar adapted to be engaged by said stop, another member disposed beneath the pivotal axis of said cutter bar adapted to be engaged a member interposed between said members and adapted to be engaged by each of said members, and an operative connection from said last-mentioned member to each of said clutches.

26. In a mining machine, a frame, a kerf cutter mounted thereon for reciprocable movement with respect thereto including a cutter bar movable about a horizontal transverse axis, a motor, a drive connection from said motor to said kerf cutter for reciprocably moving said kerf cutter along said frame without reversal of said motor including a plurality of clutches, manually operated means for shifting said clutches and automatic means for shifting said clutches when said kerf cutter is in extreme positions with respect to said frame, a drive connection from said motor to said cutter bar for moving said cutter bar about said horizontal transverse axis in reverse directions without reversal of said motor including a plurality of clutches, manually operated means for shifting said clutches, automatic means for shifting said clutches when said cutter bar is in one extreme position or another, and means interconnected with said automatic means for shifting both sets of said clutches to neutral positions when said cutter bar is at either extreme of its longitudinal or angular travel for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a stop connected with said cutter bar adapted to engage said automatic shifting means when said cutter bar is in a lowered position, and means carried by said kerf cutter for actuating said automatic shifting means when said kerf cutter is moving in a rearward direction along said frame.

27. In a mining machine, a frame, a kerf cutter mounted thereon for reciprocable movement with respect thereto including a cutter bar movable about a horizontal transverse axis, a motor, a drive connection from said motor to said kerf aoeogoo's cutter for reciprocablymoving said keri' cutter along 'said frame without reversal 0 said motor including a plurality of clutches, manually operated means for shifting said clutches, and automatic means for shifting said clutches when said kerf cutter is in extreme positions with respect to saidframe, a drive connection from said motor to said cutter bar for moving said cutter bar about said horizontal transverse axis in reverse directions without reversal of said motor including a plurality of clutches, manually operated means for shifting said clutches, automatic means for shifting said clutches when said cutter bar is in one extreme position or another, and means interconnected with said automatic means for shifting both sets of said clutches to neutral positions when said cutter bar is at either extreme of its longitudinal or angular travel for stopping rearward movement of said kerf cutter along said frame when said cutter bar is in a lowered position comprising a stop connected with said cutter bar adapted to engage said automatic shifting means when said cutter bar is in a lowered position, and means carried by said kerf cutter for actuating said automatic shifting means when said .cutter bar is in a lowered position and is moving in a rearward direction along said frame comprising a cam member on said frame and a rider member carried by said kerf cutter engageable with said cam member and having operative connection with said automatic shifting means.

28. In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontally disposed kert cutter on said support adapted to cut a horizontal keri in the mine wall, and a vertically movable kerf cutter adapted to cut a shearing kerf in the mine wall carried on said support for extension and retraction with respect thereto, a motor on said support, a drive connection from said motor to said horizontal cutting mechanism, another drive connection from said motor to said vertical cutting mechanism, and interlocking means interposed between said drives to said cutting mechanisms to prevent the driving of one cutting mechanism while the other is in operation.

29. In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar having a cutter chain movable thereabout, a motor on said support, a drive connection from said motor to said cutter chain, another cutter bar having a cutter chain movable thereabout carried by said support for extension and retraction with respect thereto and for swinging movement in a vertical plane for cutting a shearing kerf in the mine wall, a drive connection from said motor to said second cutter chain, and mechanical interlocking means interposed between said motor and the mechanisms for driving said cutter chains to prevent the driving of one cutter chain while the other cutter chain is in operation.

3D. In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar having a cutter chain movable thereabout, a motor on said support, a selective drive connection from'said motor to said cutter chain including a clutch mechanism, another cutter bar having a cutter chain movable thereabout carried by said support for' second cutter: chain including a clutch mechanism, manually operable means for shifting said clutch .mechanism, and mechanical interlocking means for interlocking said shifting mechanisms to prevent the driving of onecutter chain while 5 the other-cutter chain isin operation comprising a lever arm connectible with one of said clutch shifting mechanisms, a locking arm connectible with said other clutch shifting mechanism, and a connection between said lever arm 10 and locking arm.

31. In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar having a cutter chain movable thereabout, a motor on said sup- 1 port, a selective drive connection from said motor to said cutter chain including a clutch mechanism, another cutter bar having a cutter chain movable thereabout carried by said support for extension and retraction with respect thereto and 20 for swinging movement in a vertical plane for cutting a shearing kerf in the mine wall, a selective drive connection from said motor to said second cutter chain including a clutch mechanism, manually operable means for shifting said 25 clutch mechanisms, and mechanical interlocking means for interlocking said shifting mechanisms to prevent the driving of one cutter chain while the other cutter chain is in operation comprising a lever arm connectible with one of said clutch 30 shifting mechanisms, a locking arm connectible with said other clutch shifting mechanism, and a connection between said lever arm and locking arm comprising a pivotally movable member operatively connectible with said lever arm, and 35 adapted to engage said locking arm.

32.'In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar having a cutter chain movable thereabout, a motor on said sup- 40 port, a drive connection from said motor to said cutter chain, another cutter bar having a cutter chain movable thereabout carried by said support for extension and retraction with respect thereto and for pivotal movement in a vertical 45 plane for cutting a shearing keri' in the mine wall, a drive connection from said motor to said second-mentioned cutter chain for driving said cutter chain about said cutter bar, extending and retracting said second-mentioned cutter bar 5 with respect to said support, and pivotally moving said cutter bar in a vertical plane, and mechanical interlocking means interposed between said motor and drive connections to prevent the driving of one cutter chain while the other cutter 55 chain is in operation.

33. In a mining machine, a support, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar having a cutter chain movable thereabout, a motor on said sup- 50 port, a drive connection from said motor to said cutter chain, another cutter bar having a cutter chain movable thereabout carried by said support for extension and retraction with respect thereto and for pivotal movement in a vertical 65 plane for cutting a shearing kerf in the 'mine wall, a drive connection from said motor to said second-mentioned cutter chain for driving said cutter chain about said cutter bar, extending and retracting said second-mentioned cutter bar with 70 vertical movement of said cutter bar and mechanism connectible with said clutch mechanism and engageable with said cutter bar and support for shifting said clutch mechanisms.

WILLIAM W. SLOANE. 

